Linear vs logarithmic scales. 1  Human hearing is better measured on a logarithmic scale than a linear scale. 2  On a linear scale, a change between two values is perceived on the basis of the difference between the values.  On a logarithmic scale, a change between two values is perceived on the basis of the ratio of the two values.
Antimony has been known since ancient times. It is sometimes found free in nature, but is usually obtained from the ores stibnite (Sb 2 S 3) and valentinite (Sb 2 O 3). Nicolas Lemery, lÃ©mery A french, chemist was the first person to scientifically study antimony and its. compounds
Aluminium (or aluminum; see different endings) is a chemical element in the boron group with symbol Al and atomic number 13.It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element (after oxygen and silicon) in the Earth 's crust, and the most abundant metal there.It makes up about 8% by mass of the crust, though it is less common in the mantle below.luminium (or aluminum; see different endings) is a chemical element in the boron group with symbol Al and atomic number 13.